The atheist, agnostic, or ...

The atheist, agnostic, or secularist ... should insist on the need to engage in a meaningful debate on the entire issue of the truth or falsity (or probability or improbability) of religious tenets, without being subject to accusations of impiety, immorality, impoliteness, or any of the other smokescreens used by the pious to deflect attention from the central issues at hand.
 S. T. Joshi

Quotes from the same author

God's existence needs to be established independently before he can be brought into account for causation; it cannot be assumed at the start.
 S. T. Joshi